APN in LTE and DNN in 5G Core Are Similar Until the Architecture Matters
APN and DNN both identify data-network intent, but the surrounding EPC and 5GC procedures are different enough that treating them as pure renames is misleading.
5G Core
PCF and Policy Control Made 5G Sessions Feel Less Static
Policy is not just a config file on the gateway; in 5GC it can actively influence session behavior through dedicated network functions.
SIP and 5G Core Troubleshooting Started Converging for Me
Different protocols, same debugging discipline: establish state, identify the boundary, then follow the next dependency.
PFCP Was the Missing Link Between the SMF and UPF
5G user-plane programming became clearer once I followed PFCP instead of treating the UPF as a static router.